电纺聚丙烯腈基活性碳纳米纤维及其亚甲基蓝吸附性能  

Adsorption Property of Methylene Blue onto the Electrospun PAN-based Activated Carbon Nanofibres

作　　者：吴丹[1] 汤营茂[2] 缪清清[1] 肖荔人[2] 钱庆荣[1] 陈庆华[1] 

机构地区：[1]福建师范大学环境科学与工程学院,福建福州350117 [2]福建师范大学材料科学与工程学院,福建福州350117

出　　处：《福建师范大学学报（自然科学版）》2015年第3期50-58,共9页Journal of Fujian Normal University：Natural Science Edition

基　　金：教育部留学回国人员科研启动基金项目([2011]1568);福建省教育厅资助项目(JA10087);福建省发改委产业技术开发专项项目重大项目([2011]352)

摘　　要：以聚丙烯腈(PAN)和N,N-二甲基甲酰胺(DMF)为原料,通过静电纺丝-CO2活化法制备PAN基活性碳纳米纤维,探讨活化温度对活性碳纳米纤维孔结构及孔径分布的影响,并研究了所制备的PAN基活性碳纳米纤维对亚甲基蓝(MB)的吸附性能.结果表明,随着活化温度的升高,PAN基活性碳纳米纤维的比表面积(SBET)、总孔容(Vtotal)和微孔容(Vmi)均增大,当活化温度达到950℃时,SBET、Vtotal、Vαmi、Vtmi和VDmi分别高达1 484.5 m2·g-1、0.709 cm3·g-1、0.680 cm3·g-1、0.666 cm3·g-1和0.659cm3·g-1;Langmuir模型较Freundlich模型更适合描述所制备的PAN基活性碳纳米纤维对MB的吸附过程,且ACF950在(25±1)℃对MB的饱和吸附量高达270 mg·g-1.PAN and DMF were employed as raw materials to prepare homogenous continous PAN nanofibers using an improved electrospinning device. The electrospun PAN nanofibers were used as precursors for the fabrication of PAN-based activated carbon nanofibers via carbon dioxide（CO2） activation. The effect of activation temperature on pore structure and pore size distribution of the PAN-based ACFs were emphatically studied, and the adsorption property of methylene blue（MB） onto the prepared ACFs were also investigated. It is clear that specific surface area（SBET）,total pore volume（Vtotal） and micropore volume（Vmi） increase with increasing activation temperature. The SBET,Vtotal,Vαmi,Vtmiand VDmireach up to 1 484. 5 m^2·g^- 1,0. 709 cm^3·g^-1,0. 680cm^3·g^-1,0. 666 cm^3·g^-1 and 0. 659 cm^3·g^-1 espectively at the temperature of 950 ℃. Langmuir model is found to be better than Freundlich model to describe the MB adsorption isotherm of the prepared nanofibers. The adsorption capacity of MB onto ACF950 at（25 ± 1） ℃ is calculated to be270 mg·g^- 1.

关 键 词：静电纺丝 活性碳纳米纤维 吸附性能 亚甲基蓝 

分 类 号：TQ342.742[化学工程—化纤工业]